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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Wrenches,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Forcing a lead acid battery to cycle for the fun of it reduces its cycle life.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In a nutshell, lead acid batteries have “five lives”, each varying depending their specific intrinsic technology attributes developed by the battery OEM:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cycle life<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Corrosion life<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Stratification life<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Shorting life<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Courier New";color:#1F497D"><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">And… Temperature life<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">These lives are all inter-connected and temperature is the one that is the most influent to all of them. The interesting part is that all of these “5 lives”
are 90% of the time exacerbated by the system sizing (cyclic/non-cyclic, loads, insollation, PV array, battery bank size, wiring and power conditioning losses, etc.), the install, the setting points commissioning, the maintenance, not to forget the load patterns
(perceived vs. reality dynamics and growth of the load). Cycling for cycling does not increase the battery life. Adequate cycling based on adequate full recharge keep the battery in good health.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">John<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">John F. DeBoever<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt">Global Technical & Projects Director – Renewable Energy<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt">Trojan Battery Company<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:8.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">12380 Clark Street <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Santa Fe Springs, CA 90670<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Tel: +1-562-236-3000 Ext. 3139<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;color:#953735;mso-style-textfill-fill-color:#953735;mso-style-textfill-fill-alpha:100.0%">Cell: +1-845-514-7600 – NY office time zone: USA EST (GMT-5)<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:9.0pt">Skype: john.f.deboever<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:9.0pt">Fax: +1-562-236-3239<o:p></o:p></span></p>
<p class="MsoNormal"><a href="mailto:jdeboever@trojanbattery.com"><span lang="FR" style="font-size:9.0pt">jdeboever@trojanbattery.com</span></a><span lang="FR" style="font-size:9.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><a href="http://www.trojanbattery.com/"><span lang="FR" style="font-size:9.0pt">www.trojanbattery.com</span></a><span lang="FR" style="font-size:9.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org]
<b>On Behalf Of </b>larry@starlightsolar.com<br>
<b>Sent:</b> Friday, July 13, 2012 12:18 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Battery Experience<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Jason,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Forcing a lead acid battery to deeply discharge does not increase capacity or life of the battery. It only shortens battery life and may damage the battery. This
is one of many battery myths. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Larry Crutcher<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Starlight Solar Power Systems<o:p></o:p></span></p>
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<blockquote style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 6.0pt;margin-left:6.0pt;margin-top:5.0pt;margin-bottom:5.0pt" id="replyBlockquote">
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">-------- Original Message --------<br>
Subject: Re: [RE-wrenches] Battery Experience<br>
From: Jason Lerner <<a href="mailto:wapalco@rockisland.com">wapalco@rockisland.com</a>><br>
Date: Fri, July 13, 2012 7:28 am<br>
To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
<br>
Hello John,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">This time of year I service off grid summer cabins where people come up once a year for a few weeks. The batteries in these systems generally do not die from
over cycling, but from over/under watering, acid stratification, corrosion, and generally being ignored. The more savvy customers I will recommend they turn off the PV's when they are there to get a deep discharge in.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Could you recommend any thing else they could do to lengthen their battery bank lifespan? These systems generally have a small PV charging capability, and float
charge 350 days a year. It seems ironic that these systems that really never get used, and my battery bank at home that gets used (but not abused) and cycled daily, will last the same number of years.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Thanks very much,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Jason Lerner<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Waldron Power and Light Co.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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